Electronics Forum | Sun Feb 23 14:32:42 EST 2003 | davef
Sources of sulphur in PCB fabrication are: * Some locales have high H2S concentrations in the air. * Metal etching steps that use sulfuric acid or a sulfonated buffering compound may result in sulfate residues. * Sulfates can come from contact with
Electronics Forum | Fri Aug 25 05:23:46 EDT 2000 | Wolfgang Busko
Hi Murad, like with many other questions it�s hard to judge without seeing the effect. Assuming that this site you�re talking about is well equiped with knowledge and that they handle their processes normally to everybody�s satisfaction it�s obvious
Electronics Forum | Wed Oct 06 09:23:47 EDT 1999 | Wolfgang Busko
| I would like comments on how the industry handles 0402 parts, regarding identification. Since the parts are too small to be labeled, how can we accurately identify the parts and or values, either before or after assembly? | When the boards go to te
Electronics Forum | Sat Sep 04 09:31:35 EDT 1999 | Earl Moon
| | | Dear sirs, | | | | | | If you have experienced Proflow of DEK screen printer, please let me know the details of it. | | | | | | Best regards, | | | | | | Jame Bond | | | | | | | | James, | | | | Stir, don't shake is not good advice for c
Electronics Forum | Thu Aug 26 10:21:22 EDT 1999 | John Thorup
| | Having implemented the process of handling moisture sensitive devices our logistics department tries to classify all parts according to their moisture level. | | Going through datasheets wasn�t that helpfull, so does anyone know of a source for
Electronics Forum | Fri Jul 30 17:26:02 EDT 1999 | John Thorup
| | Surface Mount Components like QFP's in Tray usually comes sealed in an anti-static plastic pack. In case the QFP's were removed from the said anti-static bag for more than 2 weeks, do these components needed to be baked for they might produce so
Electronics Forum | Thu Jul 29 12:33:38 EDT 1999 | Wolfgang Busko
| Currently, we are baking any PCB before process on SMT, the 'reason' is to dry any possible humidity that could be inner the PCB, it does not matter if the PCB is multilayer or not. We bake PCB's at 107C for 4 hrs and the board must be process into
Electronics Forum | Fri May 21 12:24:21 EDT 1999 | KA Stillings
I normally handle the soldering issues for this facility but a question was asked of me -- What the H@## is this stuff and what is causing it? Was wondering of I could get some input from any Guru on plating issues. Need info ASAP!!!!!!!!!!!!!!!!!!!
Electronics Forum | Wed Apr 21 02:53:33 EDT 1999 | Raul N.
25 PPM)! | | | | 1. Is there a better process to solder the leads of QFP's with lifted "minute" lifted leads still having a realiable solder joints? | | | | 2. Or has anybody tried modifying solder pads and use thicker solder paste deposit to compe
Electronics Forum | Thu Mar 11 18:37:22 EST 1999 | John Watt
| | Folk's | | | | Looking for some help..I know it's not SMD but I'm sure someone will know. | | I'm trying to locate a supplyer for dispensor's for PTH DIP's for my panel assembly ( board stuffing) stages to improve tha handling. The vendor i used
